KR100858423B1 - Fabrication method of anode and electrolyte in solid oxide fuel cell - Google Patents

Abstract

A method for producing an anode and an electrolyte for a solid oxide fuel cell is provided to enable easy control of the porosity of an anode, to produce a more dense electrolyte layer, to minimize consumption of materials, and to simplify the overall process. A method for producing an anode and an electrolyte for a solid oxide fuel cell comprising an anode sheet and an electrolyte sheet on the top of one surface of anode pellets comprises the steps of: (a) molding and heat treating powder containing a mixture of an anode material and a pore forming agent to provide anode pellets; (b) laminating an anode sheet comprising the anode material with an electrolyte sheet comprising an electrolyte material to form a sheet cell; and (c) applying an adhesive slurry containing the anode material onto the sheet cell or the pellets and laminating the sheet cell with the pellets in such a manner that the anode sheet side of the sheet cell faces to the pellets, followed by heat treatment.

Description

Fabrication method of anode and electrolyte of solid oxide fuel cell {Fabrication Method of Anode and Electrolyte in Solid Oxide Fuel Cell}

The present invention relates to a method for manufacturing a solid oxide fuel cell (SOFC), in particular a method for manufacturing a medium / low temperature solid oxide fuel cell.

A solid oxide fuel cell consists of three parts: an anode, a cathode, and an electrolyte. In order to use the solid oxide fuel cell at low and low temperatures, an electrolyte having high conductivity at low temperatures should be used. The temperature of the solid oxide fuel cell the low As the Y ₂ O ₃ in ZrO ₂ doped with an electrolyte 8-YSZ (YSZ; Yttria Stabilized Zircornia) should be used instead of the electrolyte of Ceria-based. The reason is that 8-YSZ shows high ionic conductivity at high temperature, but the conductivity is very low at low temperature, so it is necessary to use Ceria-based electrolyte which maintains high ionic conductivity even at low temperature.

In addition, in order to reduce the resistance of the electrolyte, it is necessary to coat the electrolyte as thin as possible. As the Ceria-based electrolyte, CGO (Ce _0.9 Gd _0.1 O ₂ ) and SDC (Sm _0.2 Ce _0.8 O ₂ ) are frequently used. However, Ceria-based electrolytes are difficult to make thin and dense on porous anodes.

After producing a fuel electrode in the form of a pallet by a method that is widely used at present, the anode and the electrolyte is produced by spray coating or dipping method. However, it is difficult to match the shrinkage of the porous anode and the Ceria-based electrolyte, making it difficult to make a thin and dense electrolyte.

In another method, a solid oxide fuel cell is manufactured by stacking a stack-type anode and an electrolyte in a sheet form manufactured by a tape casting method. When manufactured in this way, it is possible to produce a dense electrolyte, but the amount of powder to be discarded for the production is large and the time required for manufacturing also has a long disadvantage.

Therefore, the present invention proposes a method of manufacturing a new solid oxide fuel cell having both the advantages of the production method of the pallet and the advantages of the production method of the tape casting.

It is an object of the present invention to easily control the porosity of the anode, to manufacture a dense electrolyte layer, to minimize the consumption of materials and to mass-produce a solid oxide fuel cell using a simple process, and to manufacture the present invention. It is to provide a solid oxide fuel cell (fuel electrode and electrolyte structure) produced by the method.

In the method of manufacturing an anode and an electrolyte of a solid oxide fuel cell of the present invention, in the manufacture of a solid oxide fuel cell in which a sheet cell including an anode sheet and an electrolyte sheet is positioned on an upper surface of an anode pallet, (a) anode materials and pores Forming a fuel electrode pellet by molding and heat-processing the powder mixed with the forming agent; (b) stacking an anode sheet including an anode material and an electrolyte sheet including an electrolyte material to manufacture a sheet cell; And (c) applying an adhesive slurry containing an anode material to the sheet cell or the pallet to bond the anode sheet surface of the sheet cell to abutment with the pallet, and then performing heat treatment.

The heat treatment of the step (a) of manufacturing the anode pallet is preferably a two-step heat treatment to heat treatment at 1300 to 1600 ℃ after heat treatment at 600 to 900 ℃, the temperature increase rate for heat treatment at 600 to 900 ℃ is 50 to per hour It is preferable that it is 80 degreeC.

It is preferable that the heat treatment of the step (c) in which the anode pellet and the seat cell are bonded to produce the anode and the electrolyte is 1300 to 1600 ° C. During the heat treatment of step (c), pressure may be applied during heat treatment in order to further improve the bonding between the anode pallet and the seat cell. desirable.

The anode material of step (a), (b) or (c) is NiO, Ce-based oxide or a mixture of NiO and Ce-based oxide, the electrolyte material of step (b) is Ce-based oxide, the Ce The system oxide is Ce _0.9 Gd _0.1 O ₂ , Sm _0.2 Ce _0.8 O ₂ or Nm _0.1 Ce _0.9 O ₂ , or a mixture thereof. Preferably, the mixture of NiO and Ce-based oxides has a Ce-based oxide of 0.6 to 0.9 parts by weight based on 1 part by weight of NiO, wherein the NiO has a specific surface area of 3 to 7 m ² / g, It is preferred that the surface area is 30 to 40 m ² / g.

Preferably, the pore forming agent of step (a) is carbon, and the pore forming agent is 0.05 to 0.10 part by weight based on 1 part by weight of the anode material of step (a).

The adhesive slurry comprising the anode material of step (c) for bonding between the anode pallet and the seat cell comprises a cathode material, 0.01 to 0.05 parts by weight of dispersant, 0.8 to 0.12 parts by weight of plasticizer, 0.02 to 1 part by weight of the anode material. It is preferably prepared containing from 0.06 parts by weight of binder and 1-2.2 parts by weight of solvent.

Through the manufacturing method of the solid oxide fuel cell of the present invention as described above, it is possible to obtain a high quality, high productivity solid oxide fuel cell having a pellet type anode and a sheet type electrolyte.

Since the anode of the present invention is manufactured in the form of a pallet, it is easy to control the density or size of the pores present in the anode by adjusting the pressure to form the pallet or adjusting the amount or particle size of the pore-forming agent. A fuel electrode can be manufactured. In addition, since the electrolyte of the present invention is manufactured in the form of a sheet cell in which the anode sheet and the electrolyte sheet are laminated, a dense electrolyte can be obtained, and the anode and the anode sheet surfaces of the sheet cell are bonded to each other so as to be in contact with each other to prepare a cathode and the electrolyte. Therefore, the bonding by heat treatment is excellent, there is an advantage of minimizing the consumption of materials and mass production of high efficiency anode and electrolyte using a simple process.

In the method of manufacturing an anode and an electrolyte of a solid oxide fuel cell of the present invention, in the manufacture of a solid oxide fuel cell in which a sheet cell including an anode sheet and an electrolyte sheet is positioned on an upper surface of an anode pallet, (a) anode materials and pores Forming a fuel electrode pellet by molding and heat-processing the powder mixed with the forming agent; (b) stacking an anode sheet including an anode material and an electrolyte sheet including an electrolyte material to manufacture a sheet cell; And (c) applying an adhesive slurry containing an anode material to the sheet cell or the pallet to bond the anode sheet surface of the sheet cell to abutment with the pallet, and then performing heat treatment.

As described above, the core idea of the present invention is to form a fuel electrode in a pellet form by press molding a powder including the anode material and the pore-forming agent using a mold, and to prepare the anode slurry and the electrolyte material including the anode material. A fuel cell sheet and an electrolyte sheet are prepared and bonded to each other by using an electrolyte slurry, and a sheet cell is manufactured by bonding and heat treating the pallet and the sheet cell to produce a fuel electrode and an electrolyte constituting a solid oxide fuel cell.

The core idea of the present invention is to produce a fuel electrode in the form of a pallet as shown in Figs. 1 and 2, the electrolyte layer is made of a sheet cell structure in which the anode sheet and the electrolyte sheet are laminated, the anode of the pallet and the sheet cell The surface of the sheet is bonded to each other to be in contact with each other, and then heat-treated to manufacture a fuel electrode and an electrolyte constituting the solid oxide fuel cell.

Since the anode is manufactured according to the core idea of the present invention, it is easy and easy to control the density or size of the pores present in the anode by adjusting the pressure to form the pellet or adjusting the amount or particle size of the pore-forming agent. A large amount of anodes can be manufactured in an easy way. In addition, since the electrolyte is manufactured from a sheet cell using the anode sheet and the electrolyte sheet, a compact electrolyte can be made. The anode and the anode sheet surfaces of the sheet cell are bonded to each other to be heat-treated to prepare the anode and the electrolyte. This excellent and minimized material consumption and mass production of solid oxide fuel cells using a simple process is possible.

The anode material of step (a), (b) or (c) is NiO, Ce-based oxide or a mixture of NiO and Ce-based oxide, the electrolyte material of step (b) is Ce-based oxide, the Ce The system oxide is Ce _0.9 Gd _0.1 O ₂ , Sm _0.2 Ce _0.8 O ₂ or Nm _0.1 Ce _0.9 O ₂ , or a mixture thereof. Preferably, the mixture of NiO and Ce-based oxides has a Ce-based oxide of 0.6 to 0.9 parts by weight based on 1 part by weight of NiO, wherein the NiO has a specific surface area of 3 to 7 m ² / g, It is preferred that the surface area is 30 to 40 m ² / g.

In order to implement the core idea of the present invention, the heat treatment conditions for the pallet and the heat treatment of the sheet cell and the pallet are very important, because the physical properties (porosity) and the bonding force of the pallet are determined by the heat treatment conditions.

When preparing a pellet-type anode using a mold in the step (a), it is preferable to prepare a pallet by applying a pressure of 40 to 100 kgf / cm ² , the heat treatment of the pellet-shaped anode ( Heat treatment in step a) is preferably a two-step heat treatment to heat treatment at 1300 to 1600 ℃ after heat treatment at 600 to 900 ℃. The heat treatment at 600 to 900 ℃ is a heat treatment for removing the pore-forming agent, adsorbed water and organic matter contained in the anode pallet is too low temperature below the above range to remove the pore-former, adsorbed water and organic matter If the temperature is too high above the above range, undesired cracks or pores may be formed in the pallet by excessive gas generation, and there is a risk that the pallet is destroyed by thermal stress. In addition, the temperature increase rate for heat treatment at 600 to 900 ℃ is preferably 50 to 80 ℃ per hour. If the rate of temperature rise is too fast, the pallet may have unintended cracks or pores, and there is a risk that the pallet will be destroyed by thermal stress. And the time required for heat treatment will be longer than necessary.

The heat treatment at 1300 to 1600 ° C for sintering of the pallet may be performed continuously or discontinuously after the heat treatment at 600 to 900 ° C. If the heat treatment temperature for the sintering of the pallet is less than the above range, sufficient densification between the anode materials Does not occur and the physical properties of the pallet are lowered, and if it is more than the above range, densification and particle growth occurs so actively that the desired porosity cannot be adjusted.

It is preferable that the heat treatment (heat treatment in the step (c)) of bonding the sheet cell and the pallet is 1400 to 1600 ° C. This is a temperature range in which the sheet cell and the pallet have a high-strength interface and optimize the densification of the electrolyte sheet in the anode / electrolyte sheet constituting the pallet and the sheet cell and do not deteriorate pores of the pallet intentionally controlled.

In order to apply pressure during the heat treatment, the last heat treatment step is preferably performed by placing a refractory or heat resistant alloy on top of the bonded sheet cells and pallets. In addition, the method of pressurizing by gravity or the method of applying pressure in order to increase the interface strength of each sheet interface constituting the sheet cell and the interface between the sheet cell and the pallet to obtain excellent bonding is not limited thereto. It is also possible to use a pressurization device that can be mounted in a heat treatment furnace or a pressurization method using internal gas pressure, rather than lamination of heat-resistant alloys.

In the heat treatment of step (a) and the heat treatment of step (c), the heat treatment temperature has a greater influence on the sintering and bonding than time, and the heat treatment time depends on the size of the pallet, the number of sheets stacked in the sheet cell, the size of the sheet cell, and the gas. Depending on the amount of the organic material and the pore-forming agent to generate the organic matter, the water and / or pore-forming agent in each heat treatment step is preferably optimized to obtain a desired porosity and degree of densification, more preferably the Heat treatment of step (a) is preferably heat treatment for 2 hours to 6 hours at 1300 to 1600 ℃ after 30 minutes to 3 hours heat treatment at 600 to 900 ℃, the heat treatment of step (c) is 30 minutes at 1400 to 1600 ℃ It is preferable to heat-treat for 2 hours.

The manufacturing method of the sheet cell of step (b) is a conventional method of manufacturing a solid oxide fuel cell by stacking a sheet-type anode and an electrolyte, which are manufactured by a tape casting method, as is well known. Patent Publication 2006-0093887; U.S. Patent 2007-0015045; KY Yoon et al. "Polarization measurements on single-step co-fired solid oxide fuel cells", Journal of Powder Sources, 2007, in press; T. Misono et al. "Ni-SDC cermet anode fabricated from NiO.SDC composite powder for intermediate temperature SOFC", Journal of Powder Sources, 157, 2006, 754-757), Journal of the European Ceramic Society, 2007, 27, page 673-678 "Tape Sheet cells can be fabricated using casting of new electrolyte and anode materials for SOFCs operated at intermediate temperature. However, the anode sheet is manufactured by using a slurry of the same material as the anode material forming the anode pallet of the present invention by tape casting, and the electrolyte material of the present invention (Ce _0.9 Gd _0.1 O ₂ , Sm _0.2 Ce _0.8 O ₂ or An electrolyte sheet is prepared using a slurry of Nm _0.1 Ce _0.9 O ₂ , or a mixture thereof). The slurry is mixed with a dispersant, a plasticizer, a binder or a solvent, or a mixture thereof with the anode material or the electrolyte material so as to have a viscosity and dispersibility suitable for sheet production. After stacking a single electrolyte sheet and at least one anode sheet, the stacked sheet cells may be manufactured by calcination at 400 to 900 ° C. and sintering at 1200 to 1500 ° C.

Plasticizers among the dispersants, plasticizers, binders and solvents used for slurry preparation weaken the direct pull force when the polymer materials of the polymer material are attracted to each other to maintain strength, thereby making the slurry flexible. The binder is not only adsorbed on the surface of the ceramic particles to form a bond between the particles, but also plays a role in delaying the settling speed of the particles and increasing the viscosity and the moving speed of the liquid phase. Dispersants facilitate the dispersion process to help distribute the various particles uniformly in the slurry. In this case, the dispersant may be polyvinylpyrrolidone (PVPD), LP1, or a mixture thereof, and the plasticizer may be polyethylene glycol (PEG), benzyl-butyl phthalate or a mixture thereof, and the binder may be Butvar B-98. Alternatively, polyvinyl butyral (PVB) or a mixture thereof may be used, and the solvent may be Xylene, 1-Butanol, or a mixture thereof.

Before bonding and heat treating the sheet cell prepared in step (b) and the pallet prepared in step (a), the adhesive slurry is applied to one surface of the anode sheet and the pallet of the sheet cell, and then the sheet cell and the pallet are laminated. Since both the sheet cell and the pallet are sintered to some extent through heat treatment, the laminated interface of the sheet cell and the pallet has a certain strength and is intended to provide a new sintering driving force to the interface so as to be well bonded. Therefore, it is important to adjust the viscosity of the adhesive slurry in order to improve the applicability, it is preferable to prepare the adhesive slurry using a small binder and a large number of solvents. More preferably, the adhesive slurry is prepared by including a cathode material, 0.01 to 0.05 parts by weight of a dispersant, 0.8 to 0.12 parts by weight of a plasticizer, 0.02 to 0.06 parts by weight of a binder, and 1 to 2.2 parts by weight of a solvent. .

Although the manufacturing method of the present invention described above is only the production of the anode and the electrolyte, the cathode may be formed by using a commonly used method of forming a cathode (such as tape casting or deposition) on the electrolyte of the present invention. . However, since the core idea of the present invention relates to a method for producing an anode and an electrolyte, it is obvious that a solid oxide fuel cell including a structure composed of an anode and an electrolyte manufactured according to the method of the present invention is also included in the rights of the present invention. It is true.

Hereinafter, a method of manufacturing an anode and an electrolyte layer of the solid oxide fuel cell of the present invention will be described in detail with reference to the following examples. The following embodiments are provided as examples to ensure that the spirit of the present invention can be fully conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments presented below and may be embodied in other forms.

(Example 1)

Manufacture of anode pallet

60 g of NiO (Sumitomo metal mining co. LTD, NiO FP 60690) anode material, 40 g of Ce _0.9 Gd _0.1 O ₂ (Rhodia Ankasei co. LTD, UH-061215) and carbon in graphite form (pore forming agent) 5g was mixed with 250ml of acetone and ball milled for 24 hours using zirconia balls. After the ball mill was completed, acetone was evaporated and the remaining powder was sieved using a 30 μm sieve. Pellets were prepared by placing the sieved powder in a mold and applying a pressure of 60 kgf / cm ² . The prepared pallet was placed on a high purity alumina plate, inserted into a heat treatment furnace, and heat treated according to the temperature profile of FIG. 4 is a scanning electron micrograph of the cross section of the prepared anode pallet. As can be seen in Figure 4 it can be seen that the pores are evenly distributed in a certain size inside the pallet.

Sheet cell manufacturing

50 g of Ce _0.9 Gd _0.1 O ₂ (Rhodia Ankasei co. LTD, UH-061215) 1 g PVPD (SIGMA, PVP10) 1 g, PEG (SIGMA, P3265) 5 g, Butvar B-98 (SIGMA, B0154) 9 g, 78 wt% xyl 55 g of a solvent mixed with len (SAMCHUN CHEMICALS, 120806) and 22 wt% 1-butanol (SAMCHUN CHEMICALS, 081106) was mixed and ball milled for 78 hours using a zirconia ball to prepare an electrolyte slurry. The prepared electrolyte slurry was placed in a sheet film, and an electrolyte sheet was prepared using a 5 Mil (0.127 mm) screen, followed by drying at room temperature for 3 hours.

60 g of NiO (Sumitomo metal mining co. LTD, NiO FP 60690) and 40 g of Ce _0.9 Gd _0.1 O ₂ (Rhodia Ankasei co. LTD, UH-061215) 2 g of PVPD (SIGMA, PVP10), 10 g of PEG (SIGMA, P3265), Butvar B-98 (SIGMA, B0154) 18g, 78 wt% xylene (SAMCHUN CHEMICALS, 120806) and 22 wt% 1-butanol (SAMCHUN CHEMICALS, 081106) mixed 110g of solvent and 78 hours using a zirconia ball While ball mill to prepare a fuel electrode slurry.

Using the prepared anode slurry was tape cast to a thickness of about 150㎛ on the dried electrolyte sheet.

The prepared anode slurry was placed in a sheet film, and a cathode sheet having a thickness of about 100 μm was prepared using a 5 Mil (0.127 mm) screen, and then dried at room temperature for 3 hours.

After manufacturing three anode sheets by the same method as the above method, the anode sheet was cut into a size of 4 cm x 4 cm, the electrolyte sheet was cut into a size of 4 cm x 4 cm, and the anode sheet taped to the three anode sheets and the electrolyte sheet. The materials were laminated so as to be in contact with each other and calcined at 400 ° C. and then heat treated at 1000 ° C. for 4 hours to prepare sheet cells. FIG. 5 is a scanning electron micrograph of the cross section of the manufactured sheet cell, and a scanning electron micrograph of the surface of the electrolyte sheet in the surface of the manufactured sheet cell. As can be seen in Figure 6 it can be seen that the electrolytic sheet is active densification occurs almost no pores.

Pallet and Sheet Cell Bonding

6 g of NiO (Sumitomo metal mining co. LTD, NiO FP 60690) and 4 g of Ce _0.9 Gd _0.1 O ₂ (Rhodia Ankasei co. LTD, UH-061215) 0.2 g of dispersant PVPD (SIGMA, PVP10), plasticizer PEG (SIGMA, P3265 ) 1 g, binder Butvar B-98 (SIGMA, B0154) 0.5 g, 78 wt% xylenes (SAMCHUN CHEMICALS, 120806) and 22 wt% 1-butanol (SAMCHUN CHEMICALS, 081106) mixed 11 g of solvent and zirconia balls The ball slurry was ball milled for 78 hours to prepare an adhesive slurry.

Apply the adhesive slurry to the prepared anode sheet layer of the pellet and the seat cell, and then laminate and place it on the alumina plate, and place the alumina plate (4x4x3 cm) on top of the stacked pallet and sheet cell, and insert it into the heat treatment furnace and 1400 ℃ 1 Sintering for a time to prepare a fuel electrode and an electrolyte of a solid oxide fuel cell. 7 is a cross-sectional SEM photograph of a fuel electrode and an electrolyte in which a pallet and a seat cell are bonded to each other. As shown in FIG. 7, no pores or cracks are formed in the bonded cross-section, and the fuel electrode and the dense electrolyte in which the pores are controlled are formed. Can be.

1 is a schematic view of a fuel electrode and an electrolyte according to the manufacturing method of the present invention,

2 is a view showing a manufacturing method of the present invention;

3 is a heat treatment temperature profile of the anode pellets according to the present invention,

4 is a scanning electron microscope (SEM) photograph of a cross section of the anode pallet according to the present invention;

5 is a scanning electron microscope (SEM) photograph of a cross section of a sheet cell according to the present invention;

6 is a scanning electron microscope (SEM) photograph of the surface of the electrolyte sheet of the sheet cell according to the present invention.

FIG. 7 is a scanning electron microscope (SEM) photograph of a cross section of a fuel electrode and an electrolyte in which a pallet and a seat cell are bonded according to the present invention.

Claims (14)

In the manufacture of a solid oxide fuel cell in which a sheet cell including an anode sheet and an electrolyte sheet is positioned on an upper surface of one surface of an anode pallet, (a) molding a powder in which the anode material and the pore-forming agent are mixed and heat-treated to manufacture the anode pallet; (b) stacking an anode sheet including an anode material and an electrolyte sheet including an electrolyte material to manufacture a sheet cell; And (c) applying an adhesive slurry containing an anode material to the sheet cell or the pallet to bond the anode sheet surface of the sheet cell to abutment with the pallet, and then performing heat treatment; A method for producing a fuel electrode and an electrolyte of a solid oxide fuel cell prepared by including a. The method of claim 1, The heat treatment of step (a) is a fuel cell and electrolyte manufacturing method of the solid oxide fuel cell, characterized in that the heat treatment at 600 to 900 ℃ 2 heat treatment to 1300 to 1600 ℃ heat treatment. The method of claim 2, The temperature increase rate for heat treatment at 600 to 900 ℃ is a fuel electrode and electrolyte manufacturing method of a solid oxide fuel cell, characterized in that 50 to 80 ℃ per hour. The method of claim 1, The heat treatment of the step (c) is a method for producing a fuel electrode and electrolyte of the solid oxide fuel cell, characterized in that 1300 to 1600 ℃. The method of claim 1, In order to apply the pressure during the heat treatment of the step (c), the fuel cell and the electrolyte manufacturing method of a solid oxide fuel cell, characterized in that the heat treatment by placing a refractory or heat-resistant alloy on top of the bonded sheet cell and pallet. The method of claim 1, The anode material of step (a), (b) or (c) is NiO, Ce-based oxide or a mixture of NiO and Ce-based oxide, the electrolyte material of step (b) is characterized in that the Ce-based oxide A method for producing an anode and an electrolyte of a solid oxide fuel cell. The method of claim 6, The Ce-based oxide is Ce _0.9 Gd _0.1 O ₂ , Sm _0.2 Ce _0.8 O ₂ or Nm _0.1 Ce _0.9 O ₂ , or a mixture thereof. The method of claim 6, The mixture of NiO and Ce-based oxide is a method for producing a fuel electrode and electrolyte of a solid oxide fuel cell, characterized in that the Ce-based oxide is 0.6 to 0.9 parts by weight based on 1 part by weight of NiO. The method of claim 6, The NiO has a specific surface area of 3 to 7 m ² / g of a fuel cell and electrolyte manufacturing method of a solid oxide fuel cell, characterized in that. The method of claim 7, wherein The Ce-based oxide has a specific surface area of 30 to 40 m ² / g of the anode and electrolyte manufacturing method of the solid oxide fuel cell, characterized in that. The method of claim 1, The pore forming agent of step (a) is a fuel electrode and electrolyte manufacturing method of a solid oxide fuel cell, characterized in that the carbon. The method of claim 11, And the pore-forming agent is 0.05 to 0.10 parts by weight based on 1 part by weight of the anode material of step (a). The method of claim 1, The adhesive slurry comprising the anode material of step (c) comprises a cathode material, 0.01 to 0.05 parts by weight of dispersant, 0.8 to 0.12 parts by weight of plasticizer, 0.02 to 0.06 parts by weight of binder and 1 to 2.2 weight by weight of 1 part by weight of the anode material. A method for producing a fuel electrode and an electrolyte of a solid oxide fuel cell, characterized in that it comprises a negative solvent. 14. A solid oxide fuel cell comprising a fuel electrode and an electrolyte produced by the method of any one of claims 1 to 13.

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